Fertilization
Fertilization occurs when the sperm enters the egg. loses its tail, and its head begins to swell. (Swelled head? Right! Sounds like the little guy is proud of his accomplishment!) As this union takes place, a single cell is formed. From this tiny cell, your baby will grow. Although timing the start of a pregnancy is imprecise science. some couples have good hunches about when this new life began based on their sex lives together. Other couples. who have been receiving outside medical intervention for fertility problems, may also have an exact date of fertilization.
Only a few hours after penetration, the fertilized egg, sometimes called a zygote, travels down the fallopian tube toward its destination in the uterus, or womb. It will take six days to reach the uterus and eight to ten days for implantation. As it does so, this cell is dividing, dividing, and dividing again. What you have done is produce a new mixture of chromosomes from both you and your partner. From two cells, there are four. From four cells, there are soon eight, and so on. Some cells divide quicker than others, but as this little fertilized ovum gradually becomes more complicated, it floats down your fallopian tube surrounded by nutrient cells. the end of this first week, a nearly invisible, fertilized
ovum may boast anywhere from more than one hundred cells all closely knit into a little bail and ready to move into your uterus. Experts sometimes refer to this fertilized ovum now as a which means mulberry in Latin. Inside your womb.The morula finds important nutrients-sugars, salts, and critical elements-for growth. Still floating, it will grow quickly and become more sophisticated as the cells start specializing and taking on different tasks. Some link up to create kidneys. Others complete a small heart to pump blood. Timing is precise and the genetic blueprint, with fortysix chromosomes from you and forty-six chromosomes from your mate, lays a course for your unborn baby